Diodes Incorporated PI74LPT16244CAEX

Overview

PI74LPT16244CAEX from Pericom Semiconductor is a 3.3V, 16-bit non-inverting buffer/line driver with quad-nibble 3-state control, balanced ±24mA drive capability, 4.1ns max propagation delay (LPT16244C grade), and 5V-tolerant inputs for mixed-voltage system interfacing. It operates from 2.7V to 3.6V and supports industrial temperature range (–40°C to +85°C) in a 48-pin TSSOP package.

For engineers reviewing the PI74LPT16244CAEX datasheet, PI74LPT16244CAEX pinout, PI74LPT16244CAEX application, or PI74LPT16244CAEX equivalent, key selection criteria include 3-state enable timing (5.8ns max disable), low ground bounce design, 5V-tolerant I/O compatibility, and TSSOP-48 footprint suitability for high-density memory bus and backplane driver layouts.

Technical Context

The PI74LPT16244CAEX implements four independent 4-bit groups (1A–4A inputs → 1Y–4Y outputs), each controlled by dedicated active-low 3-state enables (1OE–4OE). Its advanced low-power CMOS architecture delivers balanced sourcing and sinking (±24mA) while maintaining signal integrity on transmission lines via matched output impedance and hysteresis on all inputs.

It supports mixed-signal operation: inputs accept 3V or 5V logic levels regardless of VCC (2.7–3.6V), and outputs can safely drive 3.3V or 5V buses without external level-shifting circuitry. The device's distributed VCC/GND pin layout and multiple center power pins minimize simultaneous switching noise.

Key Specifications

Pinout & Package

Package: 48-pin TSSOP (A), 240-mil wide, Pb-free & Green compliant, with distributed VCC/GND pins and center power rails to suppress switching noise.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit buffer/line driver applications.

Compared with SN74LVC16244ADGGR and 74ALVC16244PW, the PI74LPT16244CAEX uniquely combines 5V-tolerant inputs, input hysteresis, and distributed power/ground layout-making it optimal for industrial backplanes and mixed-voltage memory subsystems where signal integrity and robustness are critical.

Availability

PI74LPT16244CAEX is available at Aetrix Electronics and suitable for memory bus drivers, industrial I/O expansion modules, backplane interface circuits, and high-density PCB bus applications requiring stable component supply and long-term lifecycle support.

Supply support for PI74LPT16244CAEX includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Pericom Semiconductor was a fabless provider of high-speed interface, timing, and signal-integrity solutions, acquired by Diodes Incorporated in 2016; its portfolio emphasizes low-jitter clock distribution and robust bus interface ICs.

The PI74LPT16244 belongs to Pericom's LPT (Low Power TTL-compatible) family, engineered specifically for high-speed, low-noise memory and system bus driving in industrial and telecom infrastructure where ground bounce and EMI must be minimized.

FAQ

Is PI74LPT16244CAEX pin-compatible with standard 16-bit buffer footprints?

Yes. It uses industry-standard double-density 48-pin TSSOP (package code A) with pinout matching JEDEC MO-153F. Pin assignments align with common 16-bit buffer layouts, including VCC/GND distribution and nibble-grouped enables, enabling drop-in replacement in existing designs using compatible LVT/LCX-family devices.

Can PI74LPT16244CAEX safely drive a 5V bus while powered from 3.3V?

Yes. Its outputs are 5V-tolerant and rated for safe connection to 5V buses when VCC = 3.3V. The datasheet confirms output clamp diodes and absolute maximum ratings allow VOUT up to +7.0V, and DC characteristics verify VOH/VOL remain within spec when driving 5V logic thresholds under load.

What is the significance of "LPT16244C" in the part number?

The "C" suffix denotes the commercial-grade speed bin: max 4.1ns propagation delay (vs. 4.8ns for "A", 5.2ns for base "LPT16244"). This grade is validated across –40°C to +85°C and ensures tighter timing margins for high-frequency memory or address bus applications requiring sub-5ns latency.

Does PI74LPT16244CAEX require external pull-up or pull-down resistors on OE pins?

No. OE pins have internal weak pull-downs (per datasheet DC characteristics), ensuring outputs default to high-impedance when un-driven. External resistors are unnecessary unless specific fail-safe behavior (e.g., forced disable during power-up sequencing) is required beyond the device's native default state.